128-bit Counter blocks (Tn, n=0,1...) are constructed in order to, e.g. cipher/decipher NAS messages. Each T block contains a sequence number, an overflow counter and a 64-bit zone also used as counter.
Altogether, there are three "counting" fields in each T block.
How/when each one of these three fields is: initialized, reset and managed/increamented during time?
What happens to each field when a new NAS message is received?